I received my USB to TTL adapter today, so decided to have a look at the NAS and see if I could get root access to it.

The Serial console is actually under where the drive is, so I’ve gotten access to it from the bottom as there’s some plastic between where the drive goes and the port itself.

NAS Connected via Serial

As you can see from the picture, I’ve stuck some jumper cords into the serial console port. The Yellow wire is actually the white wire on my USB->TTL converter, the green is still green, and black is still black. With the jumper leads plugged in, I turned the NAS On with screen listening on /dev/ttyUSB0 with a baud rate of 38400.
When you turn the NAS on with the serial console plugged in, you will be presented with the boot messages.
U-Boot 1.1.4 (Mar 3 2008 - 16:51:36)